Hair straightening brush



FIG. 1 is a top perspective view of a hair straightening brush showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left-side elevation view thereof;

FIG. 6 is a right-side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines illustrate environmental structure and form no part of the claimed design. 

CLAIM I claim the ornamental design for a hair straightening brush, as shown and described. 